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Commit 1a842913 authored by Arnd Bergmann's avatar Arnd Bergmann
Browse files

mm: remove blackfin MPU support 



The CONFIG_MPU option was only defined on blackfin, and that architecture
is now being removed, so the respective code can be simplified.

A lot of other microcontrollers have an MPU, but I suspect that if we
want to bring that support back, we'd do it differently anyway.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent e05a959f

kernel/module.c

+0 −4
Original line number Diff line number Diff line
@@ -2181,10 +2181,6 @@ static void free_module(struct module *mod) 
	/* Finally, free the core (containing the module structure) */

	disable_ro_nx(&mod->core_layout);

	module_memfree(mod->core_layout.base);



#ifdef CONFIG_MPU

	update_protections(current->mm);

#endif

}



void *__symbol_get(const char *symbol)

mm/nommu.c

+0 −20
Original line number Diff line number Diff line
@@ -662,22 +662,6 @@ static void put_nommu_region(struct vm_region *region) 
	__put_nommu_region(region);

}



/*

 * update protection on a vma

 */

static void protect_vma(struct vm_area_struct *vma, unsigned long flags)

{

#ifdef CONFIG_MPU

	struct mm_struct *mm = vma->vm_mm;

	long start = vma->vm_start & PAGE_MASK;

	while (start < vma->vm_end) {

		protect_page(mm, start, flags);

		start += PAGE_SIZE;

	}

	update_protections(mm);

#endif

}



/*

 * add a VMA into a process's mm_struct in the appropriate place in the list

 * and tree and add to the address space's page tree also if not an anonymous
@@ -695,8 +679,6 @@ static void add_vma_to_mm(struct mm_struct *mm, struct vm_area_struct *vma) 
	mm->map_count++;

	vma->vm_mm = mm;



	protect_vma(vma, vma->vm_flags);



	/* add the VMA to the mapping */

	if (vma->vm_file) {

		mapping = vma->vm_file->f_mapping;
@@ -757,8 +739,6 @@ static void delete_vma_from_mm(struct vm_area_struct *vma) 
	struct mm_struct *mm = vma->vm_mm;

	struct task_struct *curr = current;



	protect_vma(vma, 0);



	mm->map_count--;

	for (i = 0; i < VMACACHE_SIZE; i++) {

		/* if the vma is cached, invalidate the entire cache */